Fan and frame thereof

Abstract

A fan includes a frame and an impeller. The frame includes a main body, a plurality of guiding elements and a motor base. The main body has an airflow inlet and an airflow outlet. The guiding elements are disposed in the main body and located at the airflow outlet, wherein each of the guiding elements includes an inclined part and an axial extended part, and the inclined par meets the axial extended part at an angle. The motor base connects to the main body. The impeller is disposed on the motor base for providing an airflow, wherein the guiding elements guide the airflow away from the fan.

What is claimed is: 
     
       1. A frame, comprising:
 a main body having an airflow inlet and an airflow outlet; and 
 a plurality of guiding elements disposed in the main body and located at the airflow outlet, wherein each of the guiding elements comprises an inclined part and an axial extended part, and the inclined part meets the axial extended part at an angle; 
 wherein the inclined part has a first height, the axial extended part has a second height, and a ratio of the first height to the second height is between 0.2 and 5; 
 wherein the axial extended part of each of the guiding elements guides airflow away from the frame in a direction perpendicular to a radial direction of the airflow outlet, and the axial extended part is parallel to a vertical direction of the airflow outlet, and 
 wherein the sum of the first height and the second height exceeds 15 millimeters when the frame is sized as 38×38 millimeters. 
 
     
     
       2. The frame as claimed in  claim 1 , wherein the angle is between 20 degrees and 50degrees. 
     
     
       3. The frame as claimed in  claim 1 , wherein the axial extended part is parallel to a vertical direction of the frame or the axial extended part inclines to the axis of the frame by an clipping angle which is smaller than or equal to 20 degrees. 
     
     
       4. The frame as claimed in  claim 1 , wherein a cross-section of the inclined part is wing shaped, arc-shaped or streamline-shaped. 
     
     
       5. The frame as claimed in  claim 1 , wherein the inclined part and the axial extended part are integrally formed as a single piece. 
     
     
       6. The frame as claimed in  claim 1 , wherein the inclined part and the axial extended part are different components and combined to form the guiding element. 
     
     
       7. The frame as claimed in  claim 1 , further comprising a motor base connected to the main body via the guiding elements, and wherein the motor base has at least one protruding rib inside the motor base. 
     
     
       8. The frame as claimed in  claim 1 , wherein the main body is substantially rectangular, rounded, elliptic, polygonal or cone-shaped. 
     
     
       9. A fan, comprising:
 a frame, comprising: 
 a main body having an airflow inlet and an airflow outlet; 
 a plurality of guiding elements disposed in the main body and located at the airflow outlet; 
 a motor base connected to the main body; and 
 an impeller disposed on the motor base for providing airflow; 
 wherein each of the guiding elements comprises an inclined part and an axial extended part, the inclined part meets the axial extended part at an angle, the inclined part has a first height, the axial extended part has a second height, and a ratio of the first height to the second height is between 0.2 and 5, and the axial extended part of each of the guiding elements guides the airflow away from the fan in a direction perpendicular to a radial direction of the airflow outlet, and the axial extended part is parallel to a vertical direction of the airflow outlet, and 
 wherein the sum of the first height and the second height exceeds 15 millimeters when the frame is sized as 38×38 millimeters. 
 
     
     
       10. The fan as claimed in  claim 9 , wherein the angle is between 20 degrees and 50 degrees. 
     
     
       11. The fan as claimed in  claim 9 , wherein the axial extended part is parallel to a vertical direction of the frame or the axial extended part inclines to the axis of the frame by a clipping angle which is smaller than or equal to 20 degrees. 
     
     
       12. The fan as claimed in  claim 9 , wherein a cross-section of the inclined part is wing shaped, arc-shaped or streamline-shaped. 
     
     
       13. The fan as claimed in  claim 9 , wherein the inclined part and the axial extended part are integrally formed as a single piece. 
     
     
       14. The fan as claimed in  claim 9 , wherein the inclined part and the axial extended part are different components and combined to form the guiding element. 
     
     
       15. The fan as claimed in  claim 9 , wherein the main body is substantially rectangular, rounded, elliptic, polygonal or cone-shaped.